About installing ISPConfig

I need to install ISPConfig on the captioned mail server and could not find the package on repo NOR relevant tutorial on googling. Please advise whether it is not available on repo. I have to install it on;

Step 1 - Create a website:
In ISPConfig, create a website via “New site” in the main menu.
On the tab called “Basis” use webmail for the hostname and
myhostingcompany.tld for the domain name. Enable MySQL and
PHP scripts for this website but disable PHP Safe Mode.

You must create the website in ISPConfig and not webmin as a website setup with webmin will collide with ISPConfig as wpwood3 pointed out.

Click to expand...

Hi till,

I'm a little bid confused here. If I understand wpwood3's advice correctly then I can't run both of them, ISPConfig and Webmin, concurrently. In such situation I won't install the former. But how can I create a website on Webmin to compile Step-1?

Security
security Error: Domain Name Mismatch
You have attempted to establish a connection with
"www.satimis.com". However, the security certificate
presented belongs to "localhost". It is possible though
unlikely, that someone may be trying to intercept your
communication with this website.
If you suspect the certicate shown does not belong to
"www.satimis.com". please cancel the connection and notify
the site administrator.
[Vies Certificate] [Cancel] [OK]